1752 In June, self-taught Benjamin Franklin made a famous kite experiment in ancient and modern times. He and his son flew kites in the thunderstorm, which attracted lightning in the air. A series of sparks were generated between the metal key tied to the other end of the kite string and Franklin's hand. He also felt the smell of hemp electricity, which confirmed the phenomenon that lightning is electricity.

The role of electricity:

As a way of energy supply, electricity has many advantages. This means that the use of electricity is almost unlimited. For example, transportation, heating, lighting, telecommunications, computing, etc. Electricity must be the main energy source. Household appliances have changed people's way of life.

In 2 1 century, the pillar of modern industrial society is still electricity. However, while electricity brings convenience to people, there is also the danger of electric shock, so we must master safety knowledge, abide by relevant laws and regulations, and use electricity safely.